.page-contact {
  --contact-pad: 22px;
  --contact-gap: 24px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: calc(var(--header-h) + 32px) 0 0;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 84% 10%, rgba(53, 242, 214, .14), transparent 56%),
    radial-gradient(circle at 4% 86%, rgba(255, 107, 74, .11), transparent 52%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(27, 58, 87, .4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27, 58, 87, .4) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(circle at 46% 28%, #000 16%, transparent 74%);
  mask-image: radial-gradient(circle at 46% 28%, #000 16%, transparent 74%);
  opacity: .5;
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 2;
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-contact .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .crumbs__sep {
  color: var(--line);
}

.page-contact .contact-hero .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-contact .contact-hero h1 {
  margin: 0 0 18px;
  max-width: 17em;
  font-size: clamp(28px, 6.6vw, 52px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .contact-hero .lead {
  margin: 0 0 34px;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-hero__figure {
  position: relative;
  z-index: 2;
  margin: 0 auto;
}

.page-contact .contact-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: cover;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  opacity: .55;
  filter: saturate(.8) brightness(.9);
}

/* ---------- 区块通用 ---------- */
.page-contact .section {
  padding-top: 56px;
  padding-bottom: 4px;
}

.page-contact .section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  align-items: baseline;
  margin-bottom: 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-contact .section__index {
  grid-row: 1 / 3;
  align-self: start;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--moss);
  transition: color var(--ease);
}

.page-contact .section.is-active .section__index {
  color: var(--cyan);
}

.page-contact .section__title {
  grid-column: 2;
  margin: 0;
  font-size: clamp(20px, 4.4vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ice);
}

.page-contact .section__summary {
  grid-column: 2;
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 渠道对照 ---------- */
.page-contact .channel-table {
  border-top: 1px solid var(--line-soft);
}

.page-contact .channel-row {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 20px 0 20px 14px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .channel-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--ease);
}

.page-contact .channel-row:hover,
.page-contact .channel-row:focus-within {
  background: linear-gradient(90deg, rgba(53, 242, 214, .07), transparent 72%);
}

.page-contact .channel-row:hover::before,
.page-contact .channel-row:focus-within::before {
  transform: scaleY(1);
}

.page-contact .channel-row__scene {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice);
}

.page-contact .channel-row__route {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-contact .channel-row__route p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .channel-row__route a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 214, .35);
  transition: border-color var(--ease);
}

.page-contact .channel-row__route a:hover {
  border-bottom-color: var(--cyan);
}

.page-contact .channel-row .tag {
  align-self: flex-start;
}

/* ---------- 联系方式卡片 ---------- */
.page-contact .contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
}

.page-contact .contact-side {
  display: flex;
  flex-direction: column;
  gap: var(--contact-gap);
}

.page-contact .contact-card {
  position: relative;
  padding: var(--contact-pad);
  background: var(--glass);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.page-contact .contact-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(.2);
  transform-origin: left;
}

.page-contact .contact-card--mail::after {
  transform: scaleX(.34);
}

.page-contact .contact-card--phone::after {
  background: var(--coral);
  transform: scaleX(.24);
}

.page-contact .contact-card--addr::after {
  background: var(--moss);
  transform: scaleX(.14);
}

.page-contact .contact-card .card__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-contact .contact-value {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 4.6vw, 24px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .contact-card--phone .contact-value {
  color: var(--ice);
}

.page-contact .contact-value--addr {
  font-family: var(--font-sans);
  font-size: clamp(17px, 4.2vw, 21px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0;
  color: var(--ice);
  overflow-wrap: normal;
}

.page-contact .contact-note {
  margin: 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-tips {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 9px;
}

.page-contact .contact-tips li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .contact-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .contact-card--addr {
  padding-right: 52px;
}

.page-contact .addr-scale {
  position: absolute;
  right: 18px;
  top: 22px;
  bottom: 22px;
  width: 14px;
  background-image: repeating-linear-gradient(
    to bottom,
    var(--line) 0 1px,
    transparent 1px 13px
  );
  opacity: .9;
  pointer-events: none;
}

/* ---------- 商务合作 ---------- */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-contact .coop-copy p {
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .coop-copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 214, .35);
  transition: border-color var(--ease);
}

.page-contact .coop-copy a:hover {
  border-bottom-color: var(--cyan);
}

.page-contact .coop-copy h3 {
  margin: 30px 0 4px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}

.page-contact .coop-list {
  list-style: none;
  counter-reset: coop;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .coop-list li {
  counter-increment: coop;
  position: relative;
  padding-left: 42px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .coop-list li::before {
  content: counter(coop, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-contact .coop-list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ice);
}

.page-contact .coop-tail {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--coral);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .coop-media {
  margin: 0;
}

.page-contact .coop-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(.85) brightness(.88);
}

.page-contact .coop-media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .03em;
  color: var(--muted);
}

/* ---------- 问答折叠 ---------- */
.page-contact .accordion {
  border-top: 1px solid var(--line);
}

.page-contact .accordion__item {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 0;
  background: none;
  border: 0;
  text-align: left;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ice);
  cursor: pointer;
  transition: color var(--ease);
}

.page-contact .accordion__trigger:hover {
  color: var(--cyan);
}

.page-contact .accordion__trigger::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .accordion__trigger[aria-expanded="true"]::after {
  content: "\2212";
}

.page-contact .accordion__panel {
  padding: 0 0 22px;
  max-width: 44em;
}

.page-contact .accordion__panel p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .accordion__panel p:last-child {
  margin-bottom: 0;
}

.page-contact .mail-draft {
  margin: 4px 0 0;
  padding: 18px;
  background: rgba(11, 31, 54, .8);
  border-top: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--ice);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- 底部信息带 ---------- */
.page-contact .contact-strip {
  margin-top: 56px;
  border-top: 1px solid var(--line);
  background: rgba(11, 31, 54, .6);
}

.page-contact .contact-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  padding-top: 16px;
  padding-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-contact .contact-strip__brand {
  color: var(--ice);
}

.page-contact .contact-strip__icp {
  color: var(--moss);
}

.page-contact .contact-strip__addr {
  margin-left: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .channel-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    column-gap: 28px;
    align-items: start;
    padding: 22px 0 22px 18px;
  }

  .page-contact .contact-hero__figure img {
    max-height: 380px;
  }
}

@media (min-width: 900px) {
  .page-contact {
    --contact-pad: 30px;
    --contact-gap: 26px;
  }

  .page-contact .section {
    padding-top: 76px;
  }

  .page-contact .contact-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: 28px;
    align-items: start;
  }

  .page-contact .contact-card--mail {
    grid-column: span 7;
  }

  .page-contact .contact-side {
    grid-column: span 5;
  }

  .page-contact .contact-card--addr {
    margin-left: 26px;
  }

  .page-contact .coop-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 44px;
    align-items: start;
  }

  .page-contact .coop-media {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1200px) {
  .page-contact .contact-hero__figure img {
    max-height: 440px;
  }

  .page-contact .contact-card--phone {
    margin-right: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-row::before,
  .page-contact .section__index,
  .page-contact .crumbs a,
  .page-contact .accordion__trigger {
    transition: none;
  }
}